The calculation is straightforward: if you purchase shares in a startup for $50,000 and later sell them for $200,000, your capital gain is $150,000. However, the tax treatment of this gain depends critically on how long you held the investment. The IRS distinguishes between short-term capital gains (assets held for one year or less) and long-term capital gains (assets held for more than one year). Short-term gains are taxed as ordinary income at rates up to 37%, while long-term gains benefit from preferential rates of 0%, 15%, or 20%, depending on your income level.
Why It Matters
For angel investors, understanding capital gains is essential for portfolio management and tax planning. The difference in tax rates between short-term and long-term gains can significantly impact net returns—a $150,000 long-term gain might result in $30,000 in taxes at the 20% rate, versus potentially $55,500 at the highest ordinary income rate. This disparity explains why many investors prefer holding investments beyond the one-year threshold. Angel investors should also be aware that qualified small business stock (QSBS) may offer even greater tax advantages, potentially excluding up to 100% of capital gains from taxation under Section 1202 of the tax code.
Example
An angel investor purchases $100,000 worth of equity in a promising software startup in January 2023. The company grows rapidly, and by November 2023, she receives an acquisition offer that would value her stake at $400,000. If she sells immediately, the $300,000 gain would be taxed as short-term at her ordinary income rate of 35%, resulting in $105,000 in taxes. By waiting until February 2024—just three months longer—the gain becomes long-term, taxed at 20%, resulting in only $60,000 in taxes. This patience saves her $45,000, demonstrating how holding period strategy directly affects investment returns.